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VRAM
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
165
Panasonic
7.8 VRAM
7.8.1 VRAM Operation
■ Text Layer
CC: Character Code ID Code: 00
CCH[9:0]
Specifies the address of one of 1024 characters stored in the ROM.
COL: Color Control Code (Normal Mode) ID Code: 10
BSHAD[1:0]
Specifies shadowing of the character box for a 3D button effect.
00: Disable
01: Disable
10: Upper left white and lower right black shadows
11: Upper left black and lower right white shadows
CSHAD
Specifies character shadowing for a 3D effect.
0: Disable
1: Enable
FRAME
Specifies character outlining (black).
0: Disable
1: Enable
Table 7-7 VRAM Bit Allocation in Internal RAM
Text layer
1514131211109876543210
CC
Character code
00* * * * CCH9 CCH8 CCH7 CCH6 CCH5 CCH4 CCH3 CCH2 CCH1 CCH0
ID code Character address (1024 characters)
COL (normal mode)
Color control code
10* BSHAD1BSHAD0 CSHAD FRAME BLINK BCOL3 BCOL2 BCOL1 BCOL0 CCOL3 CCOL2 CCOL1 CCOL0
ID code Box shadow
Char.
shadow
Outline Blink Background color (16 colors) Character color (16 colors)
COL (closed-caption mode)
Color control code
10* * CUNDL ITALIC FRAME BLINK BCOL3 BCOL2 BCOL1 BCOL0 CCOL3 CCOL2 CCOL1 CCOL0
ID code Underline Italics Outline Blink Background color (16 colors) Character color (16 colors)
CCB
Repeat character/blank code
01* * * * * * * * * CCBF CCB3 CCB2 CCB1 CCB0
ID code
Blank/
char.
Number of blank/char. repetitions
CHP
Character H position control
11* CHSZ1 CHSZ0 CSHT CHP9 CHP8 CHP7 CHP6 CHP5 CHP4 CHP3 CHP2 CHP1 CHP0
ID code H size Shutter H display start position (1 dot resolution, 1024 steps)
CVP
Character V position control
1 1 CLAST CVSZ1 CVSZ0 CINT CVP9 CVP8 CVP7 CVP6 CVP5 CVP4 CVP3 CVP2 CVP1 CVP0
ID code
Last line
flag
V size Interrupt V display start position (1 H scan line resolution, 1024 steps)
Graphics layer
1514131211109876543210
GTC
Graphic tile code
0 GCBF GCB3 GCB2 GCB1 GCB0 GPRT GTC8 GTC7 GTC6 GTC5 GTC4 GTC3 GTC2 GTC1 GTC0
ID code
Blank/
tile
Number of blank/tile repetitions
Palette
select
Graphic tile address (512 tiles)
GHP
Graphics H position control
11* GHSZ1 GHSZ0 GSHT GHP9 GHP8 GHP7 GHP6 GHP5 GHP4 GHP3 GHP2 GHP1 GHP0
ID code H size Shutter H display start position (1 dot resolution, 1024 steps)
GVP
Graphics V position control
1 1 GLAST GVSZ1 GVSZ0 GINT GVP9 GVP8 GVP7 GVP6 GVP5 GVP4 GVP3 GVP2 GVP1 GVP0
ID code
Last line
flag
V size Interrupt V display start position (1 H scan line resolution, 1024 steps)
* Don’t-care bits